Journal of ILASS-Korea (한국분무공학회지)

Institute for Liquid Atomization and Spray Systems-Korea (한국분무공학회)
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Influence of Ultra-high Injection Pressure and Nozzle Hole Diameter on Diesel Flow and Spray Characteristics under Evaporating Condition

증발 조건에서 초고압 분사와 노즐 홀 직경이 디젤 유량 및 분무 특성에 미치는 영향에 대한 연구

  • 조원규 (KAIST 기계공학과) ;
  • 박영수 (KAIST 기계공학과) ;
  • 배충식 (KAIST 기계공학과) ;
  • 유준 (현대자동차 선행디젤엔진개발팀) ;
  • 김영호 (현대자동차 선행디젤엔진개발팀)
  • Received : 2015.03.06
  • Accepted : 2015.03.18
  • Published : 2015.03.31
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Abstract

Experimental study was conducted to investigate the effects of ultra-high injection pressure and nozzle hole diameter on diesel flow and spray characteristics. Electronically controlled ultra-high pressure fuel injection system was made to supply the fuel of ultra-high pressure consistently. Three injection pressures, 80, 160, and 250MPa were applied. Four type of injectors with identical eight nozzle holes were used. The four injectors have nozzle hole diameters of 115, 105, 95, and $85{\mu}m$ respectively. Injection quantity and rate were measured to investigate flow characteristics according to injection pressures and nozzle hole diameters. Mie-scattering and shadowgraph were performed to visualize liquid and vapor phases of diesel spray in a constant volume combustion chamber (CVCC). Ambient conditions of high pressure and high temperature in a diesel engine were simulated by using CVCC.

Keywords

References

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